1    /* 
2     * This interpreter is intended to paint different colored dots in a window. 
3     * 
4     * the commands that the interpreter can recognize and respond to are: 
5     * - BLUE: paint a blue dot 
6     * - RED: paint a red dot 
7     * - GREEN: paint a green dot 
8     * - YELLOW: paint a yellow dot 
9     * - HELP: show a list of the commands in a dialog message box 
10    * - EXIT: terminate the program 
11    */
12   package interpreters;
13   
14   import java.awt.Color;
15   import javax.swing.JOptionPane;
16   import javax.swing.SwingUtilities;
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   public class Interpreter2 {
21   
22       private void interpreter() {
23           //Create objects to think with
24           SPainter miro = new SPainter("Dot Thing", 400, 400);
25           miro.setScreenLocation(0, 0);
26           SCircle dot = new SCircle(180);
27   
28           //REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
29           while (true) {
30               String command = JOptionPane.showInputDialog(null, "Command?");
31               if (command == null) {
32                   command = "exit";
33               } //user clicked on cancel
34               if (command.equalsIgnoreCase("blue")) {
35                   miro.setColor(Color.blue);
36                   miro.paint(dot);
37               } else if (command.equalsIgnoreCase("red")) {
38                   miro.setColor(Color.red);
39                   miro.paint(dot);
40               } else if (command.equalsIgnoreCase("green")) {
41                   miro.setColor(Color.green);
42                   miro.paint(dot);
43               }else if (command.equalsIgnoreCase("yellow")) {
44                   miro.setColor(Color.yellow);
45                   miro.paint(dot);
46               } else if (command.equalsIgnoreCase("help")) {
47                   JOptionPane.showMessageDialog(null, "Valid commands are: "
48                           + "RED | BLUE | GREEN | YELLOW | HELP | EXIT ");
49               } else if (command.equalsIgnoreCase("exit")) {
50                   miro.end();
51                   System.out.println("Thank you for viewing the dots ... ");
52                   break;
53               } else {
54                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
55                           + command.toUpperCase());
56               }
57           }
58       }
59   
60       //Infrastructure for some simple painting
61   
62       public Interpreter2() {
63           interpreter();
64       }
65   
66       public static void main(String[] args) {
67           SwingUtilities.invokeLater(new Runnable() {
68               public void run() {
69                   new Interpreter2();
70               }
71           });
72       }
73   }
74